| Company | Timeline | Status | |
| Alexander (Plant) Ltd Director • Manager | 31 May 2013←12 Years→Current | Active | |
| W & H Alexander Ltd Director • Manager | 30 May 2013←12 Years→Current | Active | |
| William And Henry Alexander (Civil Engineering) Limited Secretary • Unreported | 28 Sep 2006←19 Years→Current | Active | |
| William And Henry Alexander (Civil Engineering) Limited Director • Manager | 27 Sep 2006←19 Years→Current | Active | |
